Cut each cake layer into 2 layers to make 4 layers. Place 1 layer, cut side up, on serving tray. Drizzle 1/3 of syrup mixture on layer. Spread ¼ of the whipped cream on top but not on sides. Place next layer of cake, cut side up, on first layer. Repeat topping with syrup and whipping cream with the next 2 layers. For remaining layer, place cut side down. Top with whipped cream, shaved chocolate, and cherries.